slim series 10" subwoofers... under the front seat, under the rear seats, behind the rear seats (i know you said there isnt enough room lol)... in the sides of the middle console... You're gonna have to go with slim series though... Some brands I know off the top of my head that make slims are Kicker (CVT I think), JL Audio, Pioneer Premier, and Sony. I'm sure there's others out their too...